USGS Mesozoic 22434, Iniskin Bay: Callovian, Alaska
collected by A. Grantz, J.K. Hartsock 1950
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Sphaeroceratidae
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Lilloettia stantoni
Imlay 1953
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Xenocephalites hebetus
Imlay 1953
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| (1 measurement) | ||||||||||
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Cephalopoda
- Ammonitida
- Cardioceratidae
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Cadoceras comma
Imlay 1953
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Cadoceras wosnessenskii
(Grewingk 1850)
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Cephalopoda
- Phylloceratida
- Phylloceratidae
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Phylloceras (Partschiceras) subobtusiforme
(Pompeckj 1900)
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Alaska |
| Coordinates: | 59.7° North, 153.4° West (view map) | ||
| Paleocoordinates: | 31.5° North, 86.9° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Jurassic | Epoch: | Middle Jurassic |
| Stage: | Callovian | 10 m.y. bin: | Jurassic 5 |
| Key time interval: | Callovian | ||
| Age range of interval: | 165.3 - 161.5 m.y. ago |
Stratigraphy
| Formation: | Chinitna | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Chinitna formation, from 100 ft of siltstone lying 200 ft below top. | |||||
Lithology and environment
| Primary lithology: | lithified "siliciclastic" |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | survey of museum collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | USNM | ||
| Collectors: | A. Grantz, J.K. Hartsock | Collection dates: | 1950 |
Metadata
| Database number: | 158914 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2014-07-22 23:28:37 | Last modified: | 2014-07-22 23:34:18 |
| Access level: | the public | Released: | 2014-07-22 23:28:37 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 52006. | R. W. Imlay. 1953. Callovian (Jurassic) ammonites from the United States and Alaska Part 2. Alaska Peninsula and Cook Inlet regions. United States Geological Survey Professional Paper 249-B:41-108 [M. Clapham/M. Clapham/M. Clapham] |